<!-- 热门品牌模块 -->
<template>
    <HomePanel title="热门品牌" sub-title="国际经典 品质保证">
        <template v-slot:right>
            <!-- 左右翻页小按钮 -->
            <a @click="toggle(-1)" :class="{disabled:index === 0}" href="javascript:;"
                class="iconfont icon-angle-left prev"></a>
            <a @click="toggle(1)" :class="{ disabled: index === 1 }" href="javascript:;"
                class="iconfont icon-angle-right next"></a>
        </template>
        <div class="box" ref="target">
            <Transition name="fade">
                <!-- 热门品牌数据展示 -->
                <ul class="list" v-if="brands.length" :style="{ transform: `translateX(${-index * 1240}px)` }">
                    <li v-for="item in brands" :key="item.id">
                        <RouterLink to="/">
                            <img :src="item.picture" alt="">
                        </RouterLink>
                    </li>
                </ul>
                <!-- 热门品牌骨架效果 -->
                <div v-else class="skeleton">
                    <XtxSkeleton class="item" v-for="i in 5" :key="i" animated bg="#e4e4e4" width="240px"
                        height="305px"></XtxSkeleton>
                </div>
            </Transition>
        </div>
    </HomePanel>
</template>
  
<script>
import HomePanel from './home-panel'
import { ref } from 'vue'
import { findBrand } from '@/api/home'
import { useLazyDate } from '@/hooks/index'
import XtxSkeleton from '@/components/library/xtx-skeleton.vue'
// 热门品牌小按钮切换效果
const useToggle = () => {
    const index = ref(0)
    const toggle = (setp) => {
        const newIndex = index.value + setp
        if (newIndex < 0 || newIndex > 1) return
        index.value = newIndex
    }
    return {
        toggle, index
    }
}
export default {
    name: 'HomeBrand',
    components: { HomePanel, XtxSkeleton },
    setup() {
        // 获取数据 以及绑定target
        const { target, result } = useLazyDate(() => findBrand(10))
        
        const { toggle, index } = useToggle()

        return {
            brands: result, toggle, index, target
        }
    }
}
</script>
  
<style scoped lang='less'>
.home-panel {
    background: #f5f5f5
}

.iconfont {
    width: 20px;
    height: 20px;
    background: #ccc;
    color: #fff;
    display: inline-block;
    text-align: center;
    margin-left: 5px;
    background: @xtxColor;

    &::before {
        font-size: 12px;
        position: relative;
        top: -2px
    }

    &.disabled {
        background: #ccc;
        cursor: not-allowed;
    }
}

.box {
    display: flex;
    width: 100%;
    height: 345px;
    overflow: hidden;
    padding-bottom: 40px;

    .list {
        width: 200%;
        display: flex;
        transition: all 1s;

        li {
            margin-right: 10px;
            width: 240px;

            &:nth-child(5n) {
                margin-right: 0;
            }

            img {
                width: 240px;
                height: 305px;
            }
        }
    }
}

.skeleton {
    width: 100%;
    display: flex;

    .item {
        margin-right: 10px;

        &:nth-child(5n) {
            margin-right: 0;
        }
    }
}
</style>